22420404020 has 144 divisors (see below), whose sum is σ = 56271895680. Its totient is φ = 7349626368.

The previous prime is 22420404011. The next prime is 22420404037. The reversal of 22420404020 is 2040402422.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22420403983 and 22420404001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12832787 + ... + 12834533.

Almost surely, 2^22420404020 is an apocalyptic number.

22420404020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22420404020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28135947840).

22420404020 is an abundant number, since it is smaller than the sum of its proper divisors (33851491660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22420404020 is a wasteful number, since it uses less digits than its factorization.

22420404020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930 (or 1899 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 22420404020 its reverse (2040402422), we get a palindrome (24460806442).

The spelling of 22420404020 in words is "twenty-two billion, four hundred twenty million, four hundred four thousand, twenty".